On this week’s Culture Gabfest, our critics make sense of Ridley Scott’s Alien prequel Prometheus, considering its philosophical questions as well as its monsters and robots. They then discuss Amos Kamil’s New York Times Magazine cover story about sexual abuse at The Horace Mann School. Finally, they consider the end of NPR’s popular show Car Talk and the transcendent appeal and charm of its hosts, Click and Clack, the Tappet brothers.